Adjustable drawing board



Dec. 15, 1931. c. c. WAGNER ADJUSTABLE DRAWING BOARD Filed Feb. 26, 1931INVENTOR Clarence E Eq11EF n .N R m T A I H Patented Dec. 15, 1931SJDSTROIVL COMPANY; on rnrnnnnnnnrn;

YENN SYLVANIA-- Application filed February 1 26, 1931.

This invention relates to 2 adjustable draw ing boards-,and-has improvedmeans formamtainin a drawing board at various inclinations;

A'further objectof the invention is to pro vide a drawing boardhaving arack therebene'ath with *im rovedmeans for-engaging the board at rackfor maintaining thedrawing acquired inclinations. I

Afu'rtherf object 'ofthe invention is to rovide a drawing with a baseand with a rack extending be= neath the drawing board withmeans carriedby the base for engaging the raclrand maintaining'the drawingiboard atattained inclinations; with further releasing'said engaging means atsome predetermined'elev tion ofthe'drawingboard;

The invention,

corresponding-in general with'a table or other supporting structurehaving a drawingboard hingedly extendingdownwardly from board andtl'ir'o'ugh the'base', with a detent pivotally' and shdably connectedwith the base, adapted to'engagethe rack at any attained elevation, andwith means of cooperation between the rack and the 'detent whereby the detent is removed from' the engaging position at some predeterminedelevation of the drawing board, to be maintained in such inoperativeposition until the drawing board has been returned substantially to itshorizontal normality. V

The invention is directed to other objects and possesses other featuresof novelty and advantage, some of which, together with the foregoing,will be hereinafter more fully set forth.

The drawing is a through the drawing structure, showing parts inelevation.

The drawing board 10, provided with the rail 11, is connected by meansof a hinge 12 with any type of supporting structure 13. As shown in thedrawing, this supporting vertical sectional view board and a supportingthe rack and assoclated structure or base 13 corresponds substantiallyto a table top, in

which case the drawing board forms only a part of said table top,

for anobj'eot to provide boardhing'edly connected im roved means for'therefore, comprises a base connected therewith, with a rack the drawingPATENT Gems CIARENGE C. WAGNER, OF 'IPHILADELPHIA, PENNSYLVANIA,ASSIGNOB,TO J

Serial No. 518,305. 1

the-remaining part 'ofsaid table top being represented at 14, and whenclosed to horizontal position, the topof the drawing board 10*wi1l besubstantially flush with the juxtar 7 posed sections ofthe table top14:;

Beneath the drawing board 10 a keeper 15" is applied in any approvedmanner,-andto this" keeper 15 a rack 16 ispivoted, as at 17.

The rack 16 extends downwardly through: an opening provided in the'base13," and 'a guide 18 is provided-for properly positioning this rack;The'guide '18 is preferably formed integral with the member'19 to-Whichthe detent 20 is connected.

The connection between the detent 20 and the supportingin-ernber 19 isboth-pivotal and sliding, provision for such actionbeing pro vided by aslot and a pintle 22 through said slot *and engaging the supportingdevice 19.

The rack 16 is provided with a-plurality ofshoulders 23-and thedetentwith a nose. 24 properly proportionec widely varied,

also provided with a shoulder27 and-a part 28 adjacent toisaid shoulder;i

The supporting device 19 is: also provided with a lug 29which extendsoutwardly across the normal plane of movementofthe de -Y tent 20; Y

In operation, the draw-ingiboard, starting at horizontal, maybe raisedupon'its hinge 12 and such height as has been attained will bemaintainedby'thenos'e 24 engaging some one ofthe shoulders 23 presented at thatangle. When it is desired'to close the drawing'b'oard into planar unitywith the table toprl i, itis lifted to its extreme upward lirnit, asindicated by the brolrenlin'e' 10", whichww-ill raise the hook 25 p tothe brokenline position 25". r i j it will be seen l 23 may be in'-" therack 16'is provided".

21-formed in the detent-QO,

I and positioned -to engage some of said shoulders 23am to" I 7 anyangular position, one

cated by the dotted lines 10", but it is to be drawing boards ofapproximately its limit This action engages the detent back of the point26 and the first movement is a pivotal movement, moving the detent sothat the part 28 will engage against the lug 29.

A further lifting movement will slide the detent upwardly along this lug29'and will place the shoulder 27 upon said lug 29 so that it will thenoccupy the broken line position 20.

The shoulder 27 resting upon the lug 29 Will maintain this detent in theposition 20 which removes the nose 24 from position of engagement withany of the shoulders 23 and, therefore, the drawing board 10 is free tobe returned to its horizontal position.

a As. the drawing board approaches approximately to its extremehorizontal position, it engages the nose 24 which is then at theposition 24 and by such engagement releases the shoulder 27 from the lug29, whereupon, by gravity, the detent will fall into engaging position.

The rack 16 is provided with a relatively plane section 16 against whichthe nose 24 will now engage, but no shoulders being presented throughoutthis minor section of the rack 16, no impedance will be offered to thecomplete return of the drawing board to horizontal.

It will thus'be seen that the drawing board may be lifted from itshorizontal position to of which is indiunderstood that it may assumepositions intermediate such dotted position 10 and the horizontal.

It will be maintained in any of such attained angular positions by thenose 24 in engagement with the shoulders 23. When the drawing board isto be returned to horizontal, that is to say, to form a continuation ofthe table top 14, it is merely lifted to the broken line position 10which will place the detent out of engaging position, resting upon thelug 29, leaving the rack 16 free to slide to without engagement by thedetent 20. The near approach to limit, however, will as explainedrelease the detent and return it to active position.

here is shown in the drawing only a single one of the racks and itsassociated parts, which is sufficientfor a drawing board of smalldimensions; It is obvious that for larger dimensions the racks may beduplicated.

Of course the adjustable drawing board herein disclosed may be modifiedand changed in various ways without departing from the invention hereinset forth and hereafter claimed.

The invention is hereby claimed as follows:

1. A combination with a base, of a drawing board hingedly connectedtherewith, a rack carried by the drawing board extending downwardlyrelative to the base, a detent for said rack slidably and hingedlyconnected with a plurality of shoulders, a detent havmg a noseproportioned to engage the shoulders and being pivotally and slidablyconnected'with the base, and a hook carried at the lower end of the rackadapted to actuate the detentboth pivotally and slidably upon themovement of the rack to its upper limit.

A combination with a base, a drawing board hingedly connected therewith,a rack extending downwardly from the drawing board and provided with aplurality of spaced shoulders, a detent connectedwith the base hingedlyand slidably, a lug carried by the base, a shoulder formed upon saiddetent, and a hook carried at the lower end of said rack adapted to liftsaid detent and place it upon said lug.

4. A combination with a base, a drawing board hingedly connectedtherewith, a rack extending downwardly relative to the drawing board andbase and provided with a plurality of spaced shoulders, a detenthingedly and slidably connected with the base and provided with a noseproportioned and positioned to engage selectively the shoulders of therack, a lug carried by the base, a shoulder provided upon the detent, ahooked extremity upon the lower end of said rack adapted to engage underthe detent and move the detent first pivotally and then slidably toplace the detent upon the lug and out of engagement with the rack, andmeans for removing the detent from the lug when the rack has approachedthe other limit of its movement.

In testimony whereof, I have signed my name to this specification.

CLARENCE C. WAGN

